Update README.md

Author: lemire

README.md

@@ -11,3 +11,13 @@ cmake --build build
 ctest --test-dir build --output-on-failure
 ./build/benchmarks/benchmark 
 ```
+
+## Current status
+
+The library is currently a prototype. We need more features, more tests, more benchmarks.
+
+## Coding standard
+
+We are currently targeting C++ 23 although C++ 26 might be the next step.
+
+We are assuming that the code can run without exceptions.